Add fft, 2d_fft and sinwave to examples.

[Faustine.git] / interpretor / faustio.ml

diff --git a/interpretor/faustio.ml b/interpretor/faustio.ml
index dc1ee1d..3094ce9 100644 (file)
--- a/interpretor/faustio.ml
+++ b/interpretor/faustio.ml
@@ -12,16 +12,24 @@ open Signal;;
 open Beam;;
 open Aux;;
 
-let default_output_path = "../output_sounds/";;
 let csv_read_buffer_length = 0xFFFF;;
 
 class virtual io = 
   object
+    val mutable _basename = ""
+    val mutable _dir = ""
+    method set : string -> string -> unit = 
+      fun (dir : string) ->
+       fun (basename : string) ->
+         _basename <- basename; _dir <- dir
+
     method virtual read : string array -> beam
     method virtual write : int array -> float array array array -> string array
+    
     method private concat : float array array array -> float array array = 
       fun (origin : float array array array) ->
        Array.map Array.concat (Array.map Array.to_list origin)
+
     method private channels : float array array array -> int array = 
       fun data ->
        let get_channel = fun s -> 
@@ -56,12 +64,9 @@ class waveio : io_type =
     method write : int array -> float array array array -> string array = 
       fun (rates : int array) ->
        fun (output : float array array array) ->
-         let () = print_string("    Faustine -> Writing wave files...") in
-         let tic = Sys.time () in
-
          let n = Array.length output in          
          let paths = Array.init n (fun i -> 
-           default_output_path ^ "output" ^ (string_of_int (i + 1)) ^ ".wav") in
+           _dir ^ _basename ^ (string_of_int (i + 1)) ^ ".wav") in
 
          let files = 
            let channels = self#channels output in 
@@ -71,14 +76,9 @@ class waveio : io_type =
              Sndfile.openfile ~info:(Sndfile.RDWR, file_format, channel, rate) path in
            array_map3 openwr paths channels rates in 
 
-         let () = 
            let data = self#concat output in
            let _ = array_map2 Sndfile.write files data in
            let _ = Array.map Sndfile.close files in
-           let toc = Sys.time () in
-           let duration = toc -. tic in
-           print_endline 
-             (" Done. (duration: " ^ (string_of_float duration) ^ "s)") in
          paths
   end;;
 
@@ -117,13 +117,10 @@ class csvio : io_type =
     method write : int array -> float array array array -> string array = 
       fun (rates : int array) ->
        fun (data : float array array array) ->
-         let () = print_string("    Faustine -> Writing csv files...") in
-         let tic = Sys.time () in
-         
          let paths = 
            let n = Array.length data in
            let path_pattern = fun i -> 
-             default_output_path ^ "output" ^ (string_of_int (i + 1)) ^ ".csv" in
+             _dir ^ _basename ^ (string_of_int (i + 1)) ^ ".csv" in
            Array.init n path_pattern in          
 
          let files = Array.map open_out paths in
@@ -139,8 +136,57 @@ class csvio : io_type =
            Array.map signal2string data in
          let _ = array_map2 output_string files strings in
          let _ = Array.map close_out files in
-         let toc = Sys.time () in
-         let () = print_endline 
-             (" Done. (duration: " ^ (string_of_float (toc -. tic)) ^ "s)") in
          paths
   end;;
+
+
+class iomanager = 
+  object (self)
+    val wave = new waveio
+    val csv = new csvio
+    val mutable _dir = ""
+    val mutable _format = ""
+    val mutable _basename = ""
+
+    method private grab_format : string -> string = 
+      fun (path : string) ->
+       let fragments = Str.split (Str.regexp "\.") path in
+       let n = List.length fragments in
+       List.nth fragments (n - 1)      
+
+    method read : string list -> beam_type = 
+      fun (paths : string list) ->
+       let formats = List.map self#grab_format paths in
+       let read_one : string -> string -> beam_type = 
+         fun (format : string) ->
+           fun (path : string) ->
+             if format = "wav" then wave#read [|path|]
+             else if format = "csv" then csv#read [|path|]
+             else raise (Invalid_argument "Unknown format.") in
+       let beams = List.map2 read_one formats paths in
+       let concat : beam_type -> beam_type -> beam_type = 
+         fun b1 -> fun b2 -> b1#append b2 in
+       List.fold_left concat (new beam [||]) beams
+             
+    method set : string -> string -> string -> unit = 
+      fun (dir : string) ->
+       fun (format : string) ->
+         fun (basename : string) ->
+           _dir <- dir; 
+           _format <- format; 
+           _basename <- basename;
+           wave#set _dir _basename;
+           csv#set _dir _basename
+
+    method write : int array -> float array array array -> string array = 
+      fun (rates : int array) ->
+       fun (data : float array array array) ->
+         if _format = "" then
+           raise (Invalid_argument "output format unset.")
+         else if _format = "wav" then 
+           wave#write rates data
+         else if _format = "csv" then
+           csv#write rates data 
+         else raise (Invalid_argument "unknown format.")
+       
+  end;;